Enrollment
761
Missouri · 2024-25 NCES data
2024-25 NCES data High school (grades 9-12) NCES 290291000009
Affton High — St Louis, MO
Federal NCES profile for Affton High, including enrollment, faculty, free-lunch eligibility, demographics, and resource indicators — Resource Investment Index 51/100.
👥 Class size 41
📚 AP courses 100
🌟 Gifted program 30
🎓 Counselors 62
📋 Attendance 24
How this works: Each indicator above is scored 0–100 from federal NCES and CRDC data, then averaged into the Resource Investment Index. This measures resource allocation — staffing, programs, and support services — not standardized test scores or academic outcomes. Full methodology →
School address
District: Affton 101 · Missouri
Public location data per NCES (National Center for Education Statistics) Common Core of Data. Verify the school's current address on the NCES CCD record.
Teachers (FTE)
50.0
Federal CCD staff survey
Students per teacher
14.8:1
vs 12.9:1 Missouri avg
+15% vs state
Free-lunch eligible
31.7%
vs 46.1% Missouri avg
-31% vs state
Student-teacher ratio in context
How Affton High compares with Missouri and U.S. medians
The federal record — no proprietary index, no editorial formula.
PlainSchools publishes the actual federal measurements — enrollment, staffing, demographics, discipline, and finance — straight from the NCES Common Core of Data, CRDC, and F-33 surveys. No composite rating, no opinion-based score on top. You get the same raw numbers researchers and policymakers use, with benchmarks, spending context, and equity indicators computed from the same federal datasets. Full methodology linked below.
What this school's NCES data tells you
Affton High reports 761 enrolled students to the National Center for Education Statistics (NCES) alongside 50.0 full-time-equivalent teachers, producing a 14.8:1 student-teacher ratio. That figure sits 15% above the Missouri state mean of 12.9:1, signalling larger average class loads than peers in the same state. Against the national 2024-25 average of 15.9:1, it is 7% lower, a useful calibration for families comparing districts across state lines.
Title I and federal lunch eligibility offer another window into the student body: 31.7% of pupils qualify for free meals, a proxy for household income that federal programs use to direct funding. The free-lunch share is 31% below the Missouri average and 39% below the national baseline. The school offers 23 Advanced Placement courses, a stronger academic pipeline indicator than enrollment alone. Counselor coverage works out to roughly 190 students per counselor, meeting the American School Counselor Association recommendation of 250:1. Chronic absenteeism — missing 10% or more of school days — stands at 30.5% according to the 2021-22 Civil Rights Data Collection.
On the finance side, the surrounding Affton 101 spends $15,352 per pupil district-wide, above the Missouri average of $15,248 and below the national average of $19,490. Revenue comes 77.7% from local sources (property taxes), 12.6% from the state, and 9.7% from federal programs per the NCES F-33 finance survey. Taken together, these measurements produce a Resource Investment Index of 51/100 (C-), calculated from 5 distinct NCES and CRDC indicators measuring resource allocation rather than academic outcomes.
Source: National Center for Education Statistics Common Core of Data + CRDC + F-33 · 2024-25
How Affton High compares
Cross-validating school-level NCES values against Missouri state and U.S. national means lets readers see whether this school is an outlier or in line with peers.
| Metric | This school | vs Missouri | Missouri avg | U.S. avg |
|---|---|---|---|---|
| Students per teacher | 14.8:1 | ▲ 15% | 12.9:1 | 15.9:1 |
| Free-lunch eligible | 31.7% | ▼ 31% | 46.1% | 51.8% |
| Enrollment | 761 | top 91% | — | — |
Source: NCES Common Core of Data School-level CCD + state/national means from Public School Universe · 2024-25
What the federal data reveals about equity at this school
Federal measurements — not ratings — surface the resource and opportunity picture. Below are the indicators that researchers, civil-rights monitors, and funding formulas use to assess equity.
Economic need
31.7%
free-lunch eligible
— 31% below the Missouri average of 46.1%
Below the 40% Title I threshold — federal aid targets individual qualifying students rather than schoolwide programs.
Staffing depth
14.8:1
students per teacher
— 15% above state mean
Top 78% in Missouri — lower ratio than 22% of state schools
Below the 15:1 benchmark — typical of schools with smaller class sizes and more individualized attention.
Engagement
30.5%
chronically absent (missed 10%+ of school days)
Chronic absenteeism at or above 20% — the CDC threshold for "high" — signals significant barriers to regular attendance.
Funding equity
$15,352
per pupil, district-wide
— above Missouri avg of $15,248
Below the U.S. average per-pupil spend — funding constraints may affect programs, facilities, and staffing.
Support staff
Counselors4.0 FTE
Per 190 students — the combined health-and-guidance staffing load for this school.
Discipline context
29
in-school suspensions + 72 out-of-school
Suspension rate: 3.8 per 100 students. Combined in-school and out-of-school rate: 13.3 per 100 students. Reported via the Civil Rights Data Collection. Includes 1 expulsion.
Overview
Enrollment 761 Top 91% in Missouri — larger than 9% of 2,321 state schools
Teachers (FTE) 50.0
Students per teacher 14.8:1 +15% vs state
Free-lunch eligible 31.7% -31% vs state
NCES ID 290291000009
Student demographics
White 67.5%
African American 10.5%
Two or More 8.7%
Hispanic or Latino 8.5%
Asian 4.3%
Native Hawaiian / Pacific Islander 0.3%
American Indian / Alaska Native 0.1%
Largest group: White at 67.5% of enrollment.
Programs & staff
AP courses offered 23
Counselors (FTE) 4.0
Students per counselor 190:1
Discipline & special education
Chronically absent 30.5%
In-school suspensions 29
Out-of-school suspensions 72
Expulsions 1
Funding & spending
District-wide per-pupil expenditure for Affton 101, which includes Affton High.
$15,352
Per student
+1%
vs Missouri
Avg $15,248
-21%
vs U.S.
Avg $19,490
Revenue mix
Local 77.7%
State 12.6%
Federal 9.7%
Source: NCES F-33 School District Finance Survey District-level finance · FY 2021-22 Per-pupil expenditure reflects the district-wide average. Individual school budgets are not reported at the federal level.
Other Schools in This District
- Enrollment
- 741
- Students per teacher
- 14.6:1
- Enrollment
- 562
- Students per teacher
- 13.2:1
- Enrollment
- 555
- Students per teacher
- 15.4:1
Similar high schools in St Louis
6 comparable high schools (grades 9-12) serving the same city.
Ritenour Sr. High
Standard public school
2,041 students 19.1:1 students per teacher
Oakville Sr. High
Standard public school
1,847 students 15.9:1 students per teacher
Ladue Horton Watkins High
Standard public school
1,395 students 14:1 students per teacher
Mehlville High School
Standard public school
1,388 students 14.1:1 students per teacher
Hazelwood East High
Standard public school
1,310 students 21.1:1 students per teacher
Webster Groves High
Standard public school
1,253 students 14.3:1 students per teacher
Educator & family resources
In-depth guides on understanding NCES data, school choice, and education funding.
Understanding NCES data
How CCD, CRDC and EDFacts feed every public-school number you see.
Choose a school district
Eight signals that matter more than the overall ranking number.
How schools are funded
Title I, F-33, state aid formulas and what per-pupil spending really means.
Chronic absenteeism
Why missing 10% of school matters and how it varies by district.
Magnet vs charter vs traditional
Three school types, three funding models, three sets of trade-offs.
School discipline data
What CRDC suspension and expulsion records do and don't reveal.
Frequently asked questions about Affton High
How many students attend Affton High?
Affton High has 761 students enrolled. It is a high school in ST LOUIS, MO.
What is the student-teacher ratio at Affton High?
The student-teacher ratio at Affton High is 14.8:1, which is 15% higher than the Missouri average of 12.9:1 and 7% lower than the national average of 15.9:1.
What percentage of students receive free lunch at Affton High?
31.7% of students at Affton High are eligible for free lunch, compared to the Missouri average of 46.1%.
What is the racial and ethnic makeup of Affton High?
The largest demographic group at Affton High is White at 67.5%. The school serves a diverse student body in ST LOUIS, MO.
What is the Resource Investment Index for Affton High?
Affton High has a Resource Investment Index of 51/100 (C-) based on 5 factors: student-teacher ratio, AP course offerings, counselor availability, attendance rates. This index measures federal resource allocation — staffing levels, program availability, and support services — not standardized test scores or academic outcomes.